Insulator for telegraph-lines.



Pate'nted "0118, I902.

No. 7|3,9o4.

J. E. MURRAY.

INSULATOR FOB TELEGRAPH LINES.

[Application filed Apr. 19, 1902.}

(No Model.)

MIMI

UNITED STATES PATE T OFFICE.

JOHN E. MURRAY, OF WASHINGTON, PENNSYLVANIA.

INSULATOR FOR TELEGRAPH-LINES.

SPECIFICATION forming part of Letters Patent No. 713,904, dated November18, 1902.

Application filed April 19, 1902.

T0 at whom it may concern.-

Be it known that I, JOHN E. MURRAY, a citizen of the United States ofAmerica, residing at Washington, in the county of Washington and Stateof Pennsylvania, have invented certain new and useful Improvements inInsulators for Telegraph-Lines and the Like, of which the following is aspecification, reference being had therein to the accompanying drawings.

This invention relates to certain new and useful improvements ininsulators for telegraph-poles and the like, and has for its object toprovide an insulator to which the wire may be secured and rigidly heldby the same.

Another object of my invention is to provide an insulator which willsecurely hold the wire in case the same should break and one wherein themeans of securing the wire is protected from the atmosphere, whichgenerally causes the same to corrode, hence causing the breakage.

A still further object of my invention is to provide an insulator thatwill be extremely simple in construction, strong, durable, comparativelyinexpensive to manufacture, and one that may be readily placed upon thetelegraph-pole.

With the above and other objects in view the invention consists in thenovel construction, combination, and arrangement of parts to behereinafter more fully described, and specifically pointed out in theclaim.

In describing the invention in detail reference is had to theaccompanying drawings, formingapart of this specification, and Whereinlike numerals of reference indicate like parts throughout the severalviews, in which- Figure 1 is a side elevation of my improved insulatorapplied to the arm of the telegraphpole. Fig. 2 is a front view of thesame. Fig. 3 is a vertical section of the insulator applied to the armof a pole. Fig. 4 is a side elevation of the securing-block.

In the drawings the reference-numeral 1 represents the arm of a polecarrying a screwthreaded shank 2, to which is secured my improvedinsulator, which consists of a body portion 3, which is preferablycone-shaped, the top of said cone being screw-threaded, as indicated at4..

Reference-numeral 5 indicates a slot formed in the cone-shaped member 3,the base of said slot having inclined sides 6.

The reference-numeral 7 indicates a cap Serial No- 103,778. (No model.)

which is secured upon the screw-threads 4, said cap conforming in shapeto the coneshaped portion 3.

The reference-numeral 8 represents a securing-block which has its loweredges beveled, as indicated at 9, the sides and top of said block beingcone-shaped and conforming to the inner recess 10 ofthe cap '7. En--circling-the insulator 3, near its base, is a groove 11, which isemployed to secure the wire 12 in case of an accident and it not beingdesirable to use a securing-block 8.

The reference-numeral 14 indicates a cutaway portion upon which a Wrenchmay be placed for securing the cap 7 upon the body portion 3.

The manner of securing the wire is as follows: The insulator 3 beingsecured upon the arm of a pole, the Wire is inserted in the slot 6 andthe block 8 placed therein, when the cap v7 is screwed upon thecone-shaped portion 4, pressing" the block 8 downwardly, firmly securingthe wire in the groove 6. It will be noted that a wire may terminate inthis insulator by simply securing the end in the groove by means of thesecuring block and cap and that the Wire may be readily removed whendesired.

The many advantages obtained by the use of my improved insulator will bereadily apparent from the foregoing description, taken in connectionwith the accompanying drawlngs.

It will be noted that various changes may be made in the details ofconstruction without departing from the general spirit of my invention.

Having fully described my invention, What I claim as new, and desire tosecure byLetters Patent, is

In an insulator, in combination with a wire, a body portion carrying ascrew-threaded cap, said cap provided in its opposite sides with cutawayportions, said body portion having a diametrical slot formed therein,the base of said slot having inclined sides, and a securing-block havingbeveled lower edges carried by said slot, substantially as described.

In testimony whereof I affix my signature in the presence of twoWitnesses.

JOHN E. MURRAY.

Witnesses:

EDWARD WINTER, GEO. H. SHANNON.

